Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 100 pF 10 % 50V 5LS AMMO
Walsin RD21B101K500A5HAND
RD21B101K500A5HAND
Walsin
1:
$0.27
1,325 Có hàng
Mã Phụ tùng của Mouser
791-RD21B101K500A5HA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 100 pF 10 % 50V 5LS AMMO
1,325 Có hàng
1
$0.27
10
$0.156
100
$0.094
500
$0.074
1,000
Xem
10,000
$0.036
1,000
$0.068
2,500
$0.06
5,000
$0.055
10,000
$0.036
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
100 pF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 50V 5LS AMMO
Walsin RD21B103K500A5HAND
RD21B103K500A5HAND
Walsin
1:
$0.20
9,860 Có hàng
10,000 Đang đặt hàng
Mã Phụ tùng của Mouser
791-RD21B103K500A5HA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 50V 5LS AMMO
9,860 Có hàng
10,000 Đang đặt hàng
1
$0.20
10
$0.123
100
$0.074
500
$0.058
10,000
$0.038
20,000
Xem
1,000
$0.053
2,500
$0.047
5,000
$0.043
20,000
$0.036
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
10 nF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.047 uF 10 % 50V 5LS AMMO
Walsin RD21B473K500A5CAND
RD21B473K500A5CAND
Walsin
1:
$0.24
6,696 Có hàng
Mã Phụ tùng của Mouser
791-RD21B473K500A5CA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.047 uF 10 % 50V 5LS AMMO
6,696 Có hàng
1
$0.24
10
$0.143
100
$0.086
500
$0.068
1,000
Xem
10,000
$0.035
1,000
$0.062
2,500
$0.055
5,000
$0.051
10,000
$0.035
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
47 nF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.22 uF 10 % 50V 5LS AMMO
Walsin RD21B224K500A5HAND
RD21B224K500A5HAND
Walsin
1:
$0.27
9,960 Có hàng
Mã Phụ tùng của Mouser
791-RD21B224K500A5HA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.22 uF 10 % 50V 5LS AMMO
9,960 Có hàng
1
$0.27
10
$0.152
100
$0.092
500
$0.074
10,000
$0.05
20,000
Xem
1,000
$0.063
2,500
$0.062
5,000
$0.054
20,000
$0.043
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
220 nF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP NPO 120 pF 5% 50V 5LS AMMO
Walsin RD21N121J500A5HAND
RD21N121J500A5HAND
Walsin
1:
$0.24
8,929 Có hàng
Mã Phụ tùng của Mouser
791-RD21N121J500A5HA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP NPO 120 pF 5% 50V 5LS AMMO
8,929 Có hàng
1
$0.24
10
$0.138
100
$0.084
500
$0.066
1,000
Xem
10,000
$0.032
1,000
$0.06
2,500
$0.053
5,000
$0.049
10,000
$0.032
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
120 pF
50 VDC
C0G (NP0)
5 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.047 uF 10 % 100V 5LS AMMO
Walsin RD21B473K101A5HAND
RD21B473K101A5HAND
Walsin
1:
$0.15
15,245 Có hàng
10,000 Dự kiến 04/02/2027
Mã Phụ tùng của Mouser
791-RD21B473K101A5HA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.047 uF 10 % 100V 5LS AMMO
15,245 Có hàng
10,000 Dự kiến 04/02/2027
1
$0.15
10
$0.084
100
$0.051
500
$0.04
10,000
$0.025
20,000
Xem
1,000
$0.037
2,500
$0.033
5,000
$0.03
20,000
$0.021
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
47 nF
100 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 1000 pF 10 % 100V 5LS AMMO
Walsin RD21B102K101A5CAND
RD21B102K101A5CAND
Walsin
1:
$0.19
13,648 Có hàng
Mã Phụ tùng của Mouser
791-RD21B102K101A5CA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 1000 pF 10 % 100V 5LS AMMO
13,648 Có hàng
1
$0.19
10
$0.117
100
$0.071
500
$0.055
10,000
$0.036
20,000
Xem
1,000
$0.05
2,500
$0.045
5,000
$0.041
20,000
$0.034
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
1 nF
100 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 100V 7.5LS BULK
Walsin RD21B103K101B5H07B
RD21B103K101B5H07B
Walsin
1:
$0.21
7,608 Có hàng
Mã Phụ tùng của Mouser
791-RD21B103K101B5H7
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 100V 7.5LS BULK
7,608 Có hàng
1
$0.21
10
$0.122
100
$0.074
500
$0.058
1,000
Xem
1,000
$0.053
2,500
$0.047
5,000
$0.043
10,000
$0.029
Mua
Tối thiểu: 1
Nhiều: 1
Các chi tiết
RD
Radial
10 nF
100 VDC
X7R
10 %
7.5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Bulk
Multilayer Ceramic Capacitors MLCC - Leaded 2.2uF 50V 20% X8L AEC-Q200
KVD500L225M43A0T00
Chemi-Con
1:
$3.14
1,606 Có hàng
Mã Phụ tùng của Mouser
661-KVD500L225M43A0T
Chemi-Con
Multilayer Ceramic Capacitors MLCC - Leaded 2.2uF 50V 20% X8L AEC-Q200
1,606 Có hàng
1
$3.14
10
$1.70
50
$1.51
100
$1.40
2,000
$1.19
10,000
Xem
500
$1.33
1,000
$1.26
10,000
$1.18
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
2,000
Các chi tiết
KVD
Radial
2.2 uF
50 VDC
X8L
20 %
5 mm
Dipped
- 55 C
+ 125 C
Automotive MLCCs
6.5 mm
4 mm
6.5 mm
AEC-Q200
Reel, Cut Tape, MouseReel
Multilayer Ceramic Capacitors MLCC - Leaded 10uF 25V 20% X7R
KTD250B106M43A0T00
Chemi-Con
1:
$3.08
3,526 Có hàng
Mã Phụ tùng của Mouser
661-KTD250B106M43A0T
Chemi-Con
Multilayer Ceramic Capacitors MLCC - Leaded 10uF 25V 20% X7R
3,526 Có hàng
1
$3.08
10
$2.10
50
$1.77
100
$1.65
2,000
$1.30
4,000
Xem
500
$1.44
1,000
$1.40
4,000
$1.26
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
2,000
Các chi tiết
NTD
Radial
10 uF
25 VDC
X7R
20 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
6.5 mm
4 mm
6.5 mm
Reel, Cut Tape, MouseReel
Multilayer Ceramic Capacitors MLCC - Leaded 2.2uF 100 Volt
KTD101B225M43A0T00
Chemi-Con
1:
$3.05
1,715 Có hàng
Mã Phụ tùng của Mouser
661-KTD101B225M43A0T
Chemi-Con
Multilayer Ceramic Capacitors MLCC - Leaded 2.2uF 100 Volt
1,715 Có hàng
1
$3.05
10
$2.12
50
$1.75
100
$1.55
2,000
$1.28
4,000
Xem
500
$1.41
1,000
$1.38
4,000
$1.26
10,000
Báo giá
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
2,000
Các chi tiết
NTD
Radial
2.2 uF
100 VDC
X7R
20 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
6.5 mm
4 mm
6.5 mm
Reel, Cut Tape, MouseReel
Multilayer Ceramic Capacitors MLCC - Leaded 0.47uF 250V 20% X7R
KTD251B474M43A0T00
Chemi-Con
1:
$3.11
1,512 Có hàng
Mã Phụ tùng của Mouser
661-KTD251B474M43A0T
Chemi-Con
Multilayer Ceramic Capacitors MLCC - Leaded 0.47uF 250V 20% X7R
1,512 Có hàng
1
$3.11
10
$2.16
50
$1.79
100
$1.67
2,000
$1.25
4,000
Xem
500
$1.47
1,000
$1.30
4,000
$1.23
10,000
Báo giá
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
2,000
Các chi tiết
NTD
Radial
470 nF
250 VDC
X7R
20 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
6.5 mm
4 mm
6.5 mm
Reel, Cut Tape, MouseReel
Multilayer Ceramic Capacitors MLCC - Leaded 6.8uF 50V 20% X7R
KTD500B685M43A0T00
Chemi-Con
1:
$3.17
3,782 Có hàng
Mã Phụ tùng của Mouser
661-KTD500B685M43A0T
Chemi-Con
Multilayer Ceramic Capacitors MLCC - Leaded 6.8uF 50V 20% X7R
3,782 Có hàng
1
$3.17
10
$2.30
50
$1.99
100
$1.26
2,000
$1.21
10,000
Xem
500
$1.25
1,000
$1.24
10,000
$1.18
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
2,000
Các chi tiết
NTD
Radial
6.8 uF
50 VDC
X7R
20 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
6.5 mm
4 mm
6.5 mm
Reel, Cut Tape, MouseReel
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.047 uF 10 % 50V 5LS AMMO
Walsin RD21B473K500A5HAND
RD21B473K500A5HAND
Walsin
1:
$0.24
8 Có hàng
Mã Phụ tùng của Mouser
791-RD21B473K500A5HA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.047 uF 10 % 50V 5LS AMMO
8 Có hàng
1
$0.24
10
$0.143
100
$0.086
500
$0.068
1,000
Xem
10,000
$0.036
1,000
$0.062
2,500
$0.055
5,000
$0.051
10,000
$0.036
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
47 nF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.1 uF 10 % 50V 5LS AMMO
Walsin RD21B104K500A5HAND
RD21B104K500A5HAND
Walsin
1:
$0.20
36,000 Dự kiến 07/09/2026
Mã Phụ tùng của Mouser
791-RD21B104K500A5HA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.1 uF 10 % 50V 5LS AMMO
36,000 Dự kiến 07/09/2026
1
$0.20
10
$0.124
100
$0.074
500
$0.058
10,000
$0.038
20,000
Xem
1,000
$0.053
2,500
$0.047
5,000
$0.043
20,000
$0.036
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
100 nF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded 4.7uF 100V 20% X7R
KTD101B475M43A0T00
Chemi-Con
1:
$3.45
267 Có hàng
2,000 Dự kiến 17/09/2026
Mã Phụ tùng của Mouser
661-KTD101B475M43A0T
Chemi-Con
Multilayer Ceramic Capacitors MLCC - Leaded 4.7uF 100V 20% X7R
267 Có hàng
2,000 Dự kiến 17/09/2026
1
$3.45
10
$2.47
50
$2.04
100
$1.91
2,000
$1.55
4,000
Xem
500
$1.68
1,000
$1.59
4,000
$1.46
10,000
Báo giá
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
2,000
Các chi tiết
NTD
Radial
4.7 uF
100 VDC
X7R
20 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
6.5 mm
4 mm
6.5 mm
Reel, Cut Tape
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 1000 pF 10 % 100V 5LS AMMO
Walsin RD21B102K101A5HAND
RD21B102K101A5HAND
Walsin
1:
$0.20
Không Lưu kho
Mã Phụ tùng của Mouser
791-RD21B102K101A5HA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 1000 pF 10 % 100V 5LS AMMO
Không Lưu kho
1
$0.20
10
$0.118
100
$0.072
500
$0.056
1,000
Xem
10,000
$0.028
1,000
$0.051
2,500
$0.046
5,000
$0.042
10,000
$0.028
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
1 nF
100 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 100V 5LS AMMO
Walsin RD21B103K101A5CAND
RD21B103K101A5CAND
Walsin
1:
$0.21
Không Lưu kho
Mã Phụ tùng của Mouser
791-RD21B103K101A5CA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 100V 5LS AMMO
Không Lưu kho
1
$0.21
10
$0.122
100
$0.074
500
$0.058
1,000
Xem
10,000
$0.029
1,000
$0.053
2,500
$0.047
5,000
$0.043
10,000
$0.029
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
10 nF
100 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 100V 5LS AMMO
Walsin RD21B103K101A5HAND
RD21B103K101A5HAND
Walsin
1:
$0.20
Không Lưu kho
Mã Phụ tùng của Mouser
791-RD21B103K101A5HA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 100V 5LS AMMO
Không Lưu kho
1
$0.20
10
$0.118
100
$0.071
500
$0.056
1,000
Xem
10,000
$0.028
1,000
$0.051
2,500
$0.045
5,000
$0.042
10,000
$0.028
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
10 nF
100 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 50V 5LS AMMO
Walsin RD21B103K500A5CAND
RD21B103K500A5CAND
Walsin
1:
$0.27
Không Lưu kho
Mã Phụ tùng của Mouser
791-RD21B103K500A5CA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.01 uF 10 % 50V 5LS AMMO
Không Lưu kho
1
$0.27
10
$0.157
100
$0.095
500
$0.075
1,000
Xem
10,000
$0.036
1,000
$0.068
2,500
$0.06
5,000
$0.056
10,000
$0.036
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
10 nF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.1 uF 10 % 100V 5LS AMMO
Walsin RD21B104K101A5CAND
RD21B104K101A5CAND
Walsin
1:
$0.36
Không Lưu kho
Mã Phụ tùng của Mouser
791-RD21B104K101A5CA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.1 uF 10 % 100V 5LS AMMO
Không Lưu kho
1
$0.36
10
$0.21
100
$0.127
500
$0.102
1,000
Xem
10,000
$0.058
1,000
$0.086
2,500
$0.085
5,000
$0.075
10,000
$0.058
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
100 nF
100 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.1 uF 10 % 50V 5LS AMMO
Walsin RD21B104K500A5CAND
RD21B104K500A5CAND
Walsin
1:
$0.22
Không Lưu kho
Mã Phụ tùng của Mouser
791-RD21B104K500A5CA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.1 uF 10 % 50V 5LS AMMO
Không Lưu kho
1
$0.22
10
$0.127
100
$0.077
500
$0.06
1,000
Xem
10,000
$0.03
1,000
$0.055
2,500
$0.049
5,000
$0.045
10,000
$0.03
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
100 nF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.1 uF 10 % 50V REEL
Walsin RD21B104K500T5CTND
RD21B104K500T5CTND
Walsin
1:
$0.22
Không Lưu kho
Mã Phụ tùng của Mouser
791-RD21B104K500T5CT
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.1 uF 10 % 50V REEL
Không Lưu kho
1
$0.22
10
$0.127
100
$0.077
500
$0.06
1,000
Xem
10,000
$0.03
1,000
$0.055
2,500
$0.049
5,000
$0.045
10,000
$0.03
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
100 nF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Reel, Cut Tape
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 220 pF 10 % 50V AMMO
Walsin RD21B221K500A5CAND
RD21B221K500A5CAND
Walsin
1:
$0.25
Không Lưu kho
Mã Phụ tùng của Mouser
791-RD21B221K500A5CA
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 220 pF 10 % 50V AMMO
Không Lưu kho
1
$0.25
10
$0.148
100
$0.09
500
$0.071
1,000
Xem
10,000
$0.035
1,000
$0.064
2,500
$0.057
5,000
$0.053
10,000
$0.035
Mua
Tối thiểu: 1
Nhiều: 1
Rulo cuốn :
10,000
Các chi tiết
RD
Radial
220 pF
50 VDC
X7R
10 %
5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Ammo Pack
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.22 uF 10 % 50V 7.5LS 5LL BULK
Walsin RD21B224K500B5C07B
RD21B224K500B5C07B
Walsin
1:
$0.40
Không Lưu kho
Mã Phụ tùng của Mouser
791-RD21B224K5005C7
Walsin
Multilayer Ceramic Capacitors MLCC - Leaded CAP X7R 0.22 uF 10 % 50V 7.5LS 5LL BULK
Không Lưu kho
1
$0.40
10
$0.23
100
$0.139
500
$0.112
1,000
Xem
1,000
$0.094
2,500
$0.093
5,000
$0.082
10,000
$0.063
Mua
Tối thiểu: 1
Nhiều: 1
Các chi tiết
RD
Radial
220 nF
50 VDC
X7R
10 %
7.5 mm
Dipped
- 55 C
+ 125 C
General Type MLCCs
5 mm
3.5 mm
6.5 mm
Bulk